PSLE Linda saved $720 in May. This amount was a 20% decrease from what she saved in April. The amount she saved in June was a 35% increase from what she saved in May.
- What was the total amount that Linda saved from April to June?
- What was the percentage increase in the amount Linda saved in June compared to April?
|
Savings |
April |
100% |
|
Change |
- 20% |
|
May |
80% |
100 u |
Change |
|
+ 35 u |
June |
|
135 u |
(a)
Savings in April = 100%
Savings in May = 100% - 20% = 80%
80% = 720
1% = 720 ÷ 80 = 9
Savings in April
= 100%
= 100 x 9
= $900
Savings in May = 100 u
Savings in June = 100 u + 35 u = 135 u
100 u = 720
1 u = 720 ÷ 100 = 7.2
Savings in June
= 135 u
= 135 x 7.2
= $972
Total savings from April to June
= 900 + 720 + 972
= $2592
(b)
Increase in savings in June compared to April
= 972 - 900
= $72
Percentage increase
=
Increase in savingsSavings in April x 100%
=
72900 x 100%
= 8%
Answer(s): (a) $2592; (b) 8%